I am looking to do an SAS on my 86 and was wondering if the FJ axles would be good under the truck or if I am just beter off with the truck axle? I am also having an issue finding a truck axle that is ready (one peice) and not bent. I have looked at a few and all were bent good and I dont really want to spend 400-500 on an axle or even 250 on a bent one.
All things considered, a Land Cruiser front axle will be just as much if not more money than a truck axle.
An FJ40/FJ55 axle will be narrower than your IFS rear, so you'll need spacers to make up the difference. For disk brakes, it'll need to be newer than 1976, but I would strongly suggest staying away from the '76-'78 axles since they have smaller birfs (even smaller than truck axles) and a smaller (weaker) knuckle arm bolt pattern. So you're looking at 79+ axles, which are fairly rare already, and are highly sought after by Cruiser guys looking to get front disks. The 79+ axles will also have 3.73 gears in the diff, as opposed to the 4.11s of earlier axles.
An FJ60 ('81 - 87) axle is probably close to the right width, but I can't remember the numbers off the top of my head. They're also highly sought after for the disk brake setups, but also have 3.73 gears. An FJ62 axle ('88 - '90) will be the same, but with 4.11 gears. The diff is REALLY offset to the passenger side, so the spring spacing might be affected - possibly need to outboard your springs.
And then you'll have mis-matched parts. Diffs are different between the front and rear, pinion flanges are different (I think...).
I'd just go with a truck axle. It's been done thousands of times. I'm sure you can find a decent straight one here from someone.
